Shedding mechanism



DEC. 22', 1931. G AMBLER 1,838,048

SHEDDING MECHANISM Filed June 4, 1929 2 Sheets-Sheet l i i l l5 i /5 69I 29 i E gt p 2/ i /5 I Patented Dec. 22, 1931 UNITE? STATES "PATENTOFFICE snoncn B. AMBLER, or LEOMINSTER, MASSACHUSETTS,

nssrcnon ro F. A. WHITNEY MASSACHUSETTS Application filed June 4,

of the loom illustrating so much of the shed" ding mechanism as isnecessary for an understanding of the invention, other partsof the loombeing omitted; and

Fig. 2 is a similar section with the shed open and parts being brokenaway.-

The mechanism herein shown, by way of example merely and withoutlimitation thereto, is of the singlelift type and forms a close shed.Referring to Fig. 1 of the drawings, I utilize a series of heddles 5,each controlling one or more warps and herein shown as metal stripsprovided between their ends with'a mail or eye 7 through which passes asingle warp. These heddles are shown guidedfor rectilinear verticalsliding movement in the upper and lower cross-bars 9 and .11 and may beprovided with pins 13 adapted to rest on the cross-bar 9 which thusconsti-' tutes a rest board. In the embodiment of the invention shownthe heddles are disposed in a single line across the loom. By heddle inthe ensuing claims I referto a mechanism of this kind adapted positivelyto position the warp or warps engaged therewith as it is itself movedand distinguish from a flexible coupling (such as that usuallycomprising neck cord, harness line, sleeper, mail, hanger and lingo)actuated in onejdirection by a lingo or its equivalent.

Each heddle is provided with a displaceable stop in the form of agriff-engaging hook 15 pivoted thereto at 17, the spring 19 extendingbetween the body of the hook and the offset arm 21 on the heddle servingto draw the pin 23 on the hook against the stop 25 on the heddle, thusmaintaining the hook normally at a fixed position angularly relativelyto the heddle, being that shown at the rear in Fig. 1, the correspondingheddlc being broken sniznmnc MECHANISM 1929. Serial No. 368,263.

away and omitted in Fig. 2. In this position I the hooks 15 may underliethe cross-beam 27 which serves to maintain the heddles in the depressedposition, the warps controlled thereby then forming the bottom line ofthe shed.

The hooks 15, when swung the force of springs 19 to the left in Fig. 1,as shown by the nearer'of said hooks in that figure, are adapted toengage over a vertically reciprocating griff bar 29. extending acrossthe loom between upright rods 31 which are reciprocated, as by means ofthe eccentrics 38 at their lower ends. I prefer to arrange the partsinsuch manner that the resulting draft shall be substantiallylongitudinal of the heddles. Extending between the rods 31 I preferablyprovide a counter griff bar 35 which overlies fixed stops in the form ofpins 37 projecting from the heddles 5. When certain hooks 15 areselected by suitable pattern mechanism and swung over the griff bar 29,the eccentrics reciprocate rods 31 and the griff bar raises the selectedheddles, as

shown in Fig. 2, to form the top line of the shed. The remainingheddles, not shown in said Figure, the hooks of which-remain under thebeam 27, remain and are held in depresse position to form the bottomline of the shed. The rods 31 then descend and the counter griff bar 35positively retracts the heddles which have been raised to the positionof Fig. 2. The hooks of those heddles which are not to be raised in theformation 7 of the succeeding shed are free to leave the .grifi' bar 29in the lower position of the same under the influence of their springs19 and rockinto position under beam 27.

The reciprocation of the grilf bars is herein shown as positivelyeffected by power under the influence of eccentrics 33, but theconnection of the grid bars to their operating means might be aforce-closed one. However, the griff mechanism serves in itself toactuate the heddlesin both directions and the lingoes of the ordinaryjacquard are eliminated.

Herein I have shown the hooks 15 as operated by means of connecting rodsor radius links 39 pivoted thereto and to blocks 11 slidaforward againstble on plungers 43 which move in a cross-piece 45 and are adapted to bereciprocated therein y suitable. pattern mechanism. The block 41 isherein shown as a short section of a channel, the flanges of whichprovide hearings on the plunger 43, and a suitable spring 47 isinterposed between the plunger and the block So that when the plunger 43is moved to the left in the figure, it operates through spring 47, whichis stronger than spring 19, to swing the hook 15 over. This arrangementpermits an easy motion and permits overthrow of the plungers 43. Theplungers 43 are desirably disposed in a plane at an elevation half-waybetween the lower and upper positions shown in Figs. 1 andQ-respectively of the point of connection of link 39' to hook 15tominimize the thrust action of the former as it swings. However, theyielding connection through spring 47 permits the lifting motion withoutundue strain on the parts.

Theplungers 43 may be operated by any suitable pattern mechanism, hereinshown as the reciprocating, intermittently rotating cylinder or prism 49on the faces of which are received the linked-together bars 51 carryingthe pegs 53, the whole resembling in appearance a dobby harness chain.Provision is made for inserting pegs in each bar corresponding to thevarious plungers. Where a peg is present it engages the end of theplunger when the cylinder is moved to the left as in Fig. 1, moving theplunger to the left and causing the corresponding hook 15 to be swungover grifi bar 29. If the peg is absent, the corresponding plunger andheddle are unaffected, as shown at the rear of Fig. 1. As the grill. barrises, engaging the hooks, the cylinder may retreat and turn, as shownin Fig. 2, so that at the next cycle of the parts another link of thechain will come into action when the cylinder again moves to the left.The cylinder need dwell in the forward position only long enough topermit the grifi' bar 29 effectively to engage with the hooks 15 in itsupward stroke. As seen in Fig. 2, the hook has a bill defining a throatinto which the bar enters to interlock therewith and preventdisengagement of the hook by thestress of spring 19. It may then startto retreat and turn as theshed opens and the pick takes place. If thecylinder advances to engage the plungers before the heddles have resumedthe position of Fig.1, no harm is done. Those hooks which are again tobe lifted remain in position over griff bar 29 without returning tonormal position. Those hooks controlling warps which are to betransferred to the bottom of the shed are positively drawn down bycounter griif bar 35 until they snap back under beam 27 The forwardedges of the hooks and the lower edge or griff bar 29 are preferablyrounded off as shown in the figures so that hooks controlling warpswhich are to be transferred from the bottom to the top of the shed, iffreed from beam 27 by the forward stroke of the pattern cylinder beforegrifl bar 29 reaches its lowermost position of Fig. 1, may ride over thebar until free to swing in above it, this being effected without unduestrain because of the yieldable connection of the hooks with theplungers through springs 47. Thus no dwell of the grill in stationarylower center position is required. I

I am aware that the invention may be embodied in other specific formswithout departing from the spirit or essential attributes thereof, and Itherefore desire the present embodiment to be considered in all respectsas 4 illustrative and not restrictive; reference being had to theappended claims rather than to the foregoing description to indicate thescope of the invention.

Claims:

1. A shedding mechanism tic-ally reciprocable heddles, hooks pivotedthereto, a beam overlying the hooks, pattern mechanism for rockingselected hooks from beneath the beam a griif bar for engaging the hooksto elevate the heddles, a counter griff bar engaging the heddles forreturning the comprising versame, and means for reciprocating said bars7 in unison.

2. In combination with a series of heddles guided for vertical movement,a vertically reciprocating frame having upper and lower grifi bars,projections from said heddles underlying the lower .bar, spring-pressedhooks pivotedto said heddles, and pattern means for swinging selectedhooks against their springs over said upper bar.

3. In combination with a series of heddles guided for vertical movement,a vertically reciprocating griffbars, projections from said heddlesunderlying the lower bar, spring-pressed hooks pivoted to said heddles,a beam beneath which the hooks are normally disposed, and

pattern means for swinging selected hooks against their springs oversaid upper bar.

4. In combination with a series of heddles guided for vertical movement,a vertically reciprocating frame having upper and lower grifl' bars,projections from said. heddles underlying the lower bar, hooks pivotedto said heddles and adapted alternatively to overlie the upper griff baror lie away therefrom, a beam beneath which those hooks not overlyingthe griff bar are disposed and constituting means preventing upwardmotion of the heddles, means tending to move the hooks to one posltlon,and pattern mechanism for moving selected hooksto the other position.

5. In a shedding mechanism a series of heddles guided for verticalsliding movement, grifl' engaging hooks movably mounted thereon, patternmechanism for selectively positioning the hooks, and a double actinggriif frame having upper and lower for raising and returning selectedheddles respectively LO open and close the shed.

6. In a shedding mechanism a series or heddles guided for verticalsliding movement,

grill-engaging hooks pivoted thereto, springs normally positioning saidhooks at a fixed angle, plungers having a yieldable force transmittingconnection to said hooks, and pattern mechanism cooperating with saidplungers to swing selected hooks against their springs and a griif forlifting the so shifted hooks.

7. In a shedding mechanism a series of heddles guided for verticalsliding movement grid-engaging hooks pivoted thereto, springs normallypositioning said hooks at a fixed angle, radius links connected to saidhooks, plungers secured to said links and pattern mechanism cooperatingwith. said plungers to swing selected hooks against their springs and agrid for lifting the so shifted hooks, said plunger-s operating in aplane substantially midway between the raised and lowered positions ofthe point of connection of said links to said hooks.

8. A shedding mechanism comprising a series of heddles, hooks pivotedthereto, springs between said hooks and heddles normally to swing theformer to a fixed position, a beam beneath which said hooks areretracted by the springs at the down position of the latter, areciprocating grilf for interlocking the hooks to raise the same, meansacting briefly during a portion of the cycle of the grit? wnile it isadjacent its lowermost position for shifting selected hooks into thepath of the griff, and a counter for retracting the heddles.

9. A shedding mechanism comprising a series of heddles, hooks pivotedthereto, springs between said hooks and heddles normally to swing theformer to a fixed position, areciprocatinggriif for interlockingthehooksto raise the same, and means a ting briefly during a portion of thecycle of the grill while it is adjacent its lower position and through ayieldable connection for shifting selected hooks into the path of thegrid, the upper portions of said hooks and the lower portion of thegrifi' being shaped to permit the descending grili to displace and passshifted hooks.

10. A shedding mechanism comprising a series of heddles, hooks pivotedthereto, springs between said hooks and heedles normally to swing theformer to a fixed position, a reciprocating griff for interlockng thehooks to raise the same, means acting briefly during a portion of thecycle of the grill while it is adjacent its lower position and through ayieldable connection for shifting selected hooks into the path of thegrid, the upper portions of said hooks and the lower portion of thegriff being shaped to permit the descending griff to displace and passshifted hooks, and a counter grifi' acting on the heddle for retractingthe same.

11. In a shedding mechanism a set of heddles having fixed anddisplaceable stops, reciprocating grifi" means operating between saidstops to engage in its respective phases alternately the fixed stop anda displaced stop and adapted to interlock with the displaced stop toretain it in displaced position, and pattern means for selectivelydisplacing said stops.

12. In a shedding mechanism a set of heddles having fixed anddisplaceable stops, reciprocating grifi' means operating between saidstops and passing fromits downward to its upward phase substantiallywithout dwell in stationary position, saidnieans engaging in itsrespective phases the fixed stop and a displaced stop, and adapted tointerlock with the displaced stop to retain it in displaced position,and pattern means for selectively momentarily displacing saiddisplaceable stops into the path of the griff means substantially at thelowermost position of the latter.

13. In combination with a seriesof heddle bars having hooks for engaginga grifi', a series of plungers adapted to be engaged by patternmechanism, blocks slidable on the plungers, springs interposed betweenthe plungers and blocks and connecting rods between said blocks andhooks.

let. in combination with a series of heddle bars, grid-engaging hookspivoted thereto, springs normally supporting said hooks at a fixedangle, and means for swinging the hooks against said springs comprisinga series of plungers adapted to be engaged by pattern mechanism, blocksslidable onthe plungers, springs interposed between the plungers andblocks and connecting rods between said blocks and hooks.

In a shedding mechanism, in combination with a set of heddles, a griffreciprocating without substantial dwell at its lower limit of movement,grill-engaging means carried by the heddles, pattern mechanismmomentarily acting on said means substantially at the lower position ofthe grifl to cause the grifi' to interlock selected heddles in itsupward movement positively to reciprocate the same therewithsubstantially throughout its succeeding cycle.

16. In a shedding mechanism a vertically guided rigid member forconnection to a warp, a grid-engaging hook pivoted there to, a springinterposed between said member and the hook, a connecting rod pivoted tothe hook, and a member adapted to be displaced by a pattern mechanismhaving a yielding connection to said rod for transmitting force thereto.

17. in a shedding mechanism vertically guided rigid members forconnection to the warps, grid-engaging hooks pivoted thereto,

springs interposed between the members and hooks, selective means forshifting said hooks against the force of the springs, and aprojection'on said members underlying a counter grift.

18. In a shedding mechanism a vibrating griff, individual heddles forcontrolling warps, said heddles having provision for connecting them tothe grift for positive movement thereby in both directions, means forselecting certain of said heddles for such connection and meansinterlocking the heddles not so selected to prevent them from moving.

' 19. In a shedding mechanism in combination with a reciprocating grin,heddles for controlling warps, said heddles being nor-= mally at rest todefine one side of the open shed, and means for selectively causingengagement of certain of said heddles with the grifi for positivemovement thereby to the other side of the shed and back to normalposition.

20. In a jacquard mechanism of the close shed type in combination withmeans for moving selected heddles to form the shed, warp-controllinheddles normally positively held against movement in a position defining one side of the shed and pattern means for positioning selectedheddles relatively to the grifi" to be positively moved thereby to theother side of the shed.

21. In a shedding mechanism in combination with a vibrating griil, aplurality ofheddles, means for selectively connecting certain heddles tothe griii to be actuated thereby positively in both directions, saidheddles when not so connected providing means for positively holding thecorresponding warps at the lower side of the shed.

22. In ashedding mechanism in combination with a plurality ofwarp-controlling heddles, stationary means to prevent movement of theheddles from closed shed position and selective movable means forreleasing heddles from said stationary means and moving them to openshed position.

23. In a shedding mechanism a heddle controlling one or more warps, avibrating grin means carried by the heddle for connection with the gridwhereby the heddle is positively actuated in both directions by thegriii', and a selective means briefly controlling said heddle-carriedmeans for initially effecting its connection with the griii;

24. In a shedding mechanism a heddle having an eye for a warp, a stopwith which the heddle is normally in contact toprevent its sheddingmovement and selective means to move the heddle out from engagement withsaid stop to allow shedding movement thereof.

In testimony whereof, I have signed my name to this specification.

GEORGE B. AMBLEii.

